symantic-document/Language/Symantic/Document/Term/IO.hs

   1 module Language.Symantic.Document.Term.IO
   2  ( module Language.Symantic.Document.Sym
   3  , module Language.Symantic.Document.Term.IO
   4  ) where
   5
   6 import Control.Applicative (Applicative(..))
   7 import Data.Bool
   8 import Data.Function (($), (.), id)
   9 import Data.Monoid (Monoid(..))
  10 import Data.Ord (Ord(..))
  11 import Data.Semigroup (Semigroup(..))
  12 import Data.String (IsString(..))
  13 import GHC.Exts (IsList(..))
  14 import Prelude (pred, fromIntegral, Num(..))
  15 import System.Console.ANSI
  16 import System.IO (IO)
  17 import Text.Show (Show(..))
  18 import qualified Data.List as List
  19 import qualified Data.Text.IO as Text
  20 import qualified Data.Text.Lazy.IO as TL
  21 import qualified System.IO as IO
  22
  23 import Language.Symantic.Document.Sym
  24
  25 -- * Type 'Reader'
  26 data Reader
  27  =   Reader
  28  {   reader_indent      :: !Indent    -- ^ Current indentation level, used by 'newline'.
  29  ,   reader_newline     :: TermIO     -- ^ How to display 'newline'.
  30  ,   reader_wrap_column :: !Column    -- ^ 'Column' after which 'wrap' breaks on a 'breakpoint' or 'breakspace'.
  31  ,   reader_sgr         :: ![SGR]     -- ^ Active ANSI codes.
  32  ,   reader_handle      :: !IO.Handle -- ^ Where to write.
  33  ,   reader_colorable   :: !Bool      -- ^ Whether colors are activated or not.
  34  ,   reader_decorable   :: !Bool      -- ^ Whether decorations are activated or not.
  35  }
  36
  37 -- | Default 'Reader'.
  38 defReader :: Reader
  39 defReader = Reader
  40  { reader_indent      = 0
  41  , reader_newline     = newlineWithIndent
  42  , reader_wrap_column = Nat 80
  43  , reader_sgr         = []
  44  , reader_handle      = IO.stdout
  45  , reader_colorable   = True
  46  , reader_decorable   = True
  47  }
  48
  49 -- * Type 'State'
  50 type State = Column
  51
  52 -- | Default 'State'.
  53 defState :: State
  54 defState = 0
  55
  56 -- * Type 'TermIO'
  57 newtype TermIO
  58  =      TermIO
  59  {    unTermIO :: Reader -> State ->
  60                   (State -> IO () -> IO ()) -> -- normal continuation
  61                   (State -> IO () -> IO ()) -> -- should-wrap continuation
  62                   IO () }
  63
  64 -- | Write a 'TermIO'.
  65 runTermIO :: IO.Handle -> TermIO -> IO ()
  66 runTermIO h (TermIO p) = p defReader{reader_handle=h} defState oko oko
  67         where oko _st = id
  68
  69 instance IsList TermIO where
  70         type Item TermIO = TermIO
  71         fromList = mconcat
  72         toList   = pure
  73 instance Semigroup TermIO where
  74         x <> y = TermIO $ \ro st ok ko ->
  75                 unTermIO x ro st
  76                  (\sx tx -> unTermIO y ro sx
  77                          (\sy ty -> ok sy (tx<>ty))
  78                          (\sy ty -> ko sy (tx<>ty)))
  79                  (\sx tx -> unTermIO y ro sx
  80                          (\sy ty -> ko sy (tx<>ty))
  81                          (\sy ty -> ko sy (tx<>ty)))
  82 instance Monoid TermIO where
  83         mempty  = empty
  84         mappend = (<>)
  85 instance IsString TermIO where
  86         fromString = string
  87
  88 writeH :: Column -> (IO.Handle -> IO ()) -> TermIO
  89 writeH len t =
  90         TermIO $ \ro st ok ko ->
  91                 let newCol = st + len in
  92                 (if newCol <= reader_wrap_column ro then ok else ko)
  93                 newCol (t (reader_handle ro))
  94
  95 instance Textable TermIO where
  96         empty     = TermIO $ \_ro st ok _ko -> ok st mempty
  97         charH   t = writeH 1 (`IO.hPutChar` t)
  98         stringH t = writeH (length t) (`IO.hPutStr` t)
  99         textH   t = writeH (length t) (`Text.hPutStr` t)
 100         ltextH  t = writeH (length t) (`TL.hPutStr` t)
 101         int       = stringH . show
 102         integer   = stringH . show
 103         replicate cnt p | cnt <= 0  = empty
 104                         | otherwise = p <> replicate (pred cnt) p
 105         newline = TermIO $ \ro -> unTermIO (reader_newline ro) ro
 106 instance Alignable TermIO where
 107         align p = TermIO $ \ro st -> unTermIO p ro{reader_indent=st} st
 108         withNewline nl  p = TermIO $ \ro -> unTermIO p ro{reader_newline=nl}
 109         withIndent  ind p = TermIO $ \ro -> unTermIO p ro{reader_indent=ind}
 110         incrIndent  ind p = TermIO $ \ro -> unTermIO p ro{reader_indent=reader_indent ro + ind}
 111         column f = TermIO $ \ro st -> unTermIO (f st) ro st
 112         newlineWithoutIndent = TermIO $ \ro _st ok _ko ->
 113                 ok 0 $ IO.hPutChar (reader_handle ro) '\n'
 114         newlineWithIndent = TermIO $ \ro@Reader{reader_handle=h} _st ok _ko ->
 115                 ok (reader_indent ro) $ do
 116                         IO.hPutChar h '\n'
 117                         IO.hPutStr h $ List.replicate (fromIntegral $ reader_indent ro) ' '
 118 instance Wrapable TermIO where
 119         ifWrap y x = TermIO $ \ro st ok ko ->
 120                 unTermIO x ro st ok (\_sx _tx -> unTermIO y ro st ok ko)
 121         breakpoint onNoBreak onBreak p = TermIO $ \ro st ok ko ->
 122                 unTermIO (onNoBreak <> p) ro st ok
 123                  (\_sp _tp -> unTermIO (onBreak <> p) ro st ok ko)
 124         withWrapColumn col p = TermIO $ \ro -> unTermIO p ro{reader_wrap_column=col}
 125
 126 writeSGR :: (Reader -> Bool) -> SGR -> TermIO -> TermIO
 127 writeSGR isOn s (TermIO t) =
 128         TermIO $ \ro ->
 129                 if isOn ro
 130                 then unTermIO (o <> m <> c) ro
 131                 else t ro
 132         where
 133         o = TermIO $ \ro st ok _ko -> ok st $ hSetSGR (reader_handle ro) [s]
 134         m = TermIO $ \ro -> t ro{reader_sgr=s:reader_sgr ro}
 135         c = TermIO $ \ro st ok _ko -> ok st $ hSetSGR (reader_handle ro) $ Reset:List.reverse (reader_sgr ro)
 136
 137 instance Colorable TermIO where
 138         colorable f       = TermIO $ \ro -> unTermIO (f (reader_colorable ro)) ro
 139         withColorable b t = TermIO $ \ro -> unTermIO t ro{reader_colorable=b}
 140         reverse     = writeSGR reader_colorable $ SetSwapForegroundBackground True
 141         black       = writeSGR reader_colorable $ SetColor Foreground Dull  Black
 142         red         = writeSGR reader_colorable $ SetColor Foreground Dull  Red
 143         green       = writeSGR reader_colorable $ SetColor Foreground Dull  Green
 144         yellow      = writeSGR reader_colorable $ SetColor Foreground Dull  Yellow
 145         blue        = writeSGR reader_colorable $ SetColor Foreground Dull  Blue
 146         magenta     = writeSGR reader_colorable $ SetColor Foreground Dull  Magenta
 147         cyan        = writeSGR reader_colorable $ SetColor Foreground Dull  Cyan
 148         white       = writeSGR reader_colorable $ SetColor Foreground Dull  White
 149         blacker     = writeSGR reader_colorable $ SetColor Foreground Vivid Black
 150         redder      = writeSGR reader_colorable $ SetColor Foreground Vivid Red
 151         greener     = writeSGR reader_colorable $ SetColor Foreground Vivid Green
 152         yellower    = writeSGR reader_colorable $ SetColor Foreground Vivid Yellow
 153         bluer       = writeSGR reader_colorable $ SetColor Foreground Vivid Blue
 154         magentaer   = writeSGR reader_colorable $ SetColor Foreground Vivid Magenta
 155         cyaner      = writeSGR reader_colorable $ SetColor Foreground Vivid Cyan
 156         whiter      = writeSGR reader_colorable $ SetColor Foreground Vivid White
 157         onBlack     = writeSGR reader_colorable $ SetColor Background Dull  Black
 158         onRed       = writeSGR reader_colorable $ SetColor Background Dull  Red
 159         onGreen     = writeSGR reader_colorable $ SetColor Background Dull  Green
 160         onYellow    = writeSGR reader_colorable $ SetColor Background Dull  Yellow
 161         onBlue      = writeSGR reader_colorable $ SetColor Background Dull  Blue
 162         onMagenta   = writeSGR reader_colorable $ SetColor Background Dull  Magenta
 163         onCyan      = writeSGR reader_colorable $ SetColor Background Dull  Cyan
 164         onWhite     = writeSGR reader_colorable $ SetColor Background Dull  White
 165         onBlacker   = writeSGR reader_colorable $ SetColor Background Vivid Black
 166         onRedder    = writeSGR reader_colorable $ SetColor Background Vivid Red
 167         onGreener   = writeSGR reader_colorable $ SetColor Background Vivid Green
 168         onYellower  = writeSGR reader_colorable $ SetColor Background Vivid Yellow
 169         onBluer     = writeSGR reader_colorable $ SetColor Background Vivid Blue
 170         onMagentaer = writeSGR reader_colorable $ SetColor Background Vivid Magenta
 171         onCyaner    = writeSGR reader_colorable $ SetColor Background Vivid Cyan
 172         onWhiter    = writeSGR reader_colorable $ SetColor Background Vivid White
 173 instance Decorable TermIO where
 174         decorable f       = TermIO $ \ro -> unTermIO (f (reader_decorable ro)) ro
 175         withDecorable b t = TermIO $ \ro -> unTermIO t ro{reader_decorable=b}
 176         bold        = writeSGR reader_decorable $ SetConsoleIntensity BoldIntensity
 177         underline   = writeSGR reader_decorable $ SetUnderlining SingleUnderline
 178         italic      = writeSGR reader_decorable $ SetItalicized True